Add support for Redacted US databases

Closes #134.

Author: oschwald

CHANGELOG.md

@@ -1,5 +1,7 @@
 # 2.0.0-beta.3
 
+* Add support for `GeoIP-City-Redacted-US` and `GeoIP-Enterprise-Redacted-US`.
+  Requested by Tom Anderson. GitHub #134.
 * Upgrade `github.com/oschwald/maxminddb-golang/v2` to `v2.0.0-beta.7`.
 
 # 2.0.0-beta.2

reader.go

@@ -140,6 +140,7 @@ func getDBType(reader *maxminddb.Reader) (databaseType, error) {
 		"DBIP-Country",
 		"DBIP-Location (compat=City)",
 		"GeoLite2-City",
+		"GeoIP-City-Redacted-US",
 		"GeoIP2-City",
 		"GeoIP2-City-Africa",
 		"GeoIP2-City-Asia-Pacific",
@@ -156,6 +157,7 @@ func getDBType(reader *maxminddb.Reader) (databaseType, error) {
 		return isDomain, nil
 	case "DBIP-ISP (compat=Enterprise)",
 		"DBIP-Location-ISP (compat=Enterprise)",
+		"GeoIP-Enterprise-Redacted-US",
 		"GeoIP2-Enterprise":
 		return isEnterprise | isCity | isCountry, nil
 	case "GeoIP2-ISP", "GeoIP2-Precision-ISP":